J. Conrad

Publications68
h-index28
Citations2,406
Highly Influential Citations81
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Screening of mango (Mangifera indica L.) cultivars for their contents of flavonol O- and xanthone C-glycosides, anthocyanins, and pectin.
With respect to their browning potential and in consideration of a combined recovery of pectin and phenolic compounds, peels of 14 cultivars and the flesh of nine cultivars of mango (Mangifera indica… Expand
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Enzymatic production and complete nuclear magnetic resonance assignment of the sugar lactulose.
The enzymatic transgalactosylation from lactose to fructose leading to the prebiotic disaccharide lactulose was investigated using the beta-galactosidase from Aspergillus oryzae and the… Expand
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Isolation of carotenoids from plant materials and dietary supplements by high-speed counter-current chromatography.
Methods for the isolation of lipophilic pigments from crude extracts of plant materials (spinach and sweet corn) by high-speed counter-current chromatography (HSCCC) were developed. Particular… Expand
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Application of HPLC coupled with DAD, APcI-MS and NMR to the analysis of lutein and zeaxanthin stereoisomers in thermally processed vegetables
Abstract A method for the simultaneous determination of lutein and zeaxanthin stereoisomers by HPLC-DAD was developed. For this purpose, ( Z )-isomers of lutein and zeaxanthin were prepared by… Expand
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Restriction-endonuclease analysis of DNA from 15 Giardia isolates obtained from humans and animals.
The DNA banding pattern of 11 human and four animal isolates (two beaver, one cat, and one guinea pig) of Giardia were compared by using two related techniques. Patterns were compared after… Expand
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Detection of phloridzin in strawberries (Fragaria x ananassa Duch.) by HPLC-PDA-MS/MS and NMR spectroscopy.
The phenolic profile of strawberry fruits (Fragaria x ananassa Duch., Rosaceae) was investigated by high-performance liquid chromatography with photodiode array detection. A peak displaying retention… Expand
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Isoterchebulin and 4,6-O-isoterchebuloyl-D-glucose, novel hydrolyzable tannins from Terminalia macroptera.
Two new hydrolyzable tannins, isoterchebulin (1) and 4,6-O-isoterchebuloyl-D-glucose (2), together with six known tannins, 3-8, were isolated from the bark of Terminalia macroptera. Their structures… Expand
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An enantiocomplementary dirigent protein for the enantioselective laccase-catalyzed oxidative coupling of phenols.
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LC-NMR, NMR, and LC-MS identification and LC-DAD quantification of flavonoids and ellagic acid derivatives in Drosera peltata.
The herb of Drosera peltata, commonly named the shield sundew, is used as an antitussive in phytotherapy, although the plants' composition has not been determined in detail so far. Hence, in this… Expand
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Unexpected carbonyl mobility in aminoketoses: the key to major Maillard crosslinks.
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